Rainbow with possible swim bladder issue

[piranha86]

Hi,
My boesemani Rainbow has been swimming vertically for the last 4-5 days now (see video). All other fish are fine so far. I suspect it has swim bladder issues. After researching online, I stopped feeding for the last 2 days and have only fed my stock some boiled peas without skin. Am I following the right treatment? Should I also start an Octozin dose?

Water tests show no ammonia or nitrites. Nitrate is around 10 and because I live in a hard water area my kH is 9dkH and GH is 14 dGH

[TropicalFishForums]

[Mishellfish]

I have had success by using kanaplex before for a fish that sank to the bottom of the tank. Good luck with your fish